diff --git a/Cargo.lock b/Cargo.lock
index 57557d4d..e6202e90 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -92,26 +92,6 @@ dependencies = [
  "syn 1.0.109",
 ]
 
-[[package]]
-name = "enum-iterator"
-version = "2.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c280b9e6b3ae19e152d8e31cf47f18389781e119d4013a2a2bb0180e5facc635"
-dependencies = [
- "enum-iterator-derive",
-]
-
-[[package]]
-name = "enum-iterator-derive"
-version = "1.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a1ab991c1362ac86c61ab6f556cff143daa22e5a15e4e189df818b2fd19fe65b"
-dependencies = [
- "proc-macro2",
- "quote",
- "syn 2.0.18",
-]
-
 [[package]]
 name = "form_urlencoded"
 version = "1.2.0"
@@ -508,7 +488,6 @@ name = "samlang-ast"
 version = "0.10.1"
 dependencies = [
  "enum-as-inner",
- "enum-iterator",
  "itertools",
  "pretty_assertions",
  "samlang-heap",
@@ -520,7 +499,6 @@ version = "0.10.1"
 dependencies = [
  "enum-as-inner",
  "itertools",
- "phf",
  "pretty_assertions",
  "samlang-ast",
  "samlang-collections",
@@ -620,7 +598,6 @@ dependencies = [
 name = "samlang-parser"
 version = "0.10.1"
 dependencies = [
- "enum-iterator",
  "itertools",
  "phf",
  "pretty_assertions",
diff --git a/crates/samlang-ast/Cargo.toml b/crates/samlang-ast/Cargo.toml
index 0e915486..88ff6cf7 100644
--- a/crates/samlang-ast/Cargo.toml
+++ b/crates/samlang-ast/Cargo.toml
@@ -5,7 +5,6 @@ edition = "2021"
 
 [dependencies]
 enum-as-inner = "0.5.1"
-enum-iterator = "2.1.0"
 itertools = "0.13.0"
 samlang-heap = { path = "../samlang-heap" }
 
diff --git a/crates/samlang-checker/Cargo.toml b/crates/samlang-checker/Cargo.toml
index e16d2cfb..08ebd2b3 100644
--- a/crates/samlang-checker/Cargo.toml
+++ b/crates/samlang-checker/Cargo.toml
@@ -6,7 +6,6 @@ edition = "2021"
 [dependencies]
 enum-as-inner = "0.5.1"
 itertools = "0.13.0"
-phf = { version = "0.11", features = ["macros"] }
 samlang-ast = { path = "../samlang-ast" }
 samlang-collections = { path = "../samlang-collections" }
 samlang-errors = { path = "../samlang-errors" }
diff --git a/crates/samlang-parser/Cargo.toml b/crates/samlang-parser/Cargo.toml
index a53adb2e..a7f3d48b 100644
--- a/crates/samlang-parser/Cargo.toml
+++ b/crates/samlang-parser/Cargo.toml
@@ -4,7 +4,6 @@ version = "0.10.1"
 edition = "2021"
 
 [dependencies]
-enum-iterator = "2.1.0"
 itertools = "0.13.0"
 phf = { version = "0.11", features = ["macros"] }
 samlang-ast = { path = "../samlang-ast" }
diff --git a/crates/samlang-parser/src/lexer.rs b/crates/samlang-parser/src/lexer.rs
index 14cd4480..6b1bdde2 100644
--- a/crates/samlang-parser/src/lexer.rs
+++ b/crates/samlang-parser/src/lexer.rs
@@ -364,7 +364,41 @@ static KEYWORDS: phf::Map<&'static str, Keyword> = phf_map! {
   "assert" => Keyword::Assert,
 };
 
-#[derive(Copy, Clone, PartialEq, Eq, enum_iterator::Sequence)]
+static TOKEN_OPS: [TokenOp; 31] = [
+  TokenOp::Underscore,
+  TokenOp::LeftParenthesis,
+  TokenOp::RightParenthesis,
+  TokenOp::LeftBrace,
+  TokenOp::RightBrace,
+  TokenOp::LeftBracket,
+  TokenOp::RightBracket,
+  TokenOp::Question,
+  TokenOp::Semicolon,
+  TokenOp::Colon,
+  TokenOp::ColonColon,
+  TokenOp::Comma,
+  TokenOp::Dot,
+  TokenOp::Bar,
+  TokenOp::Arrow,
+  TokenOp::Assign,
+  TokenOp::Not,
+  TokenOp::Multiply,
+  TokenOp::Divide,
+  TokenOp::Mod,
+  TokenOp::Plus,
+  TokenOp::Minus,
+  TokenOp::LessThan,
+  TokenOp::LessThanOrEqual,
+  TokenOp::GreaterThan,
+  TokenOp::GreaterThanOrEqual,
+  TokenOp::Equal,
+  TokenOp::NotEqual,
+  TokenOp::And,
+  TokenOp::Or,
+  TokenOp::DotDotDot,
+];
+
+#[derive(Copy, Clone, PartialEq, Eq)]
 pub(super) enum TokenOp {
   Underscore,
   // Parentheses
@@ -572,7 +606,7 @@ pub(super) fn lex_source_program(
 ) -> Vec<Token> {
   let mut stream = char_stream::CharacterStream::new(module_reference, source);
   let mut tokens = vec![];
-  let mut known_sorted_operators = enum_iterator::all::<TokenOp>().collect::<Vec<_>>();
+  let mut known_sorted_operators = TOKEN_OPS.to_vec();
   known_sorted_operators.sort_by_key(|op| -(op.as_str().len() as i64));
 
   loop {